When making a skew-T chart with MetPy, it can be difficult to see the temperature and dew point traces with the fiducial lines (mixing ratio, moist adiabats, etc.) plotted as well. Is there a method (not seen in the documentation that I see) to fade these into the background (e.g. alpha)?
Also setting the limits seems to behave a bit strangely as we want to set the x-limit on a skewed line. Not really sure that that could be made easier.
答案 0 :(得分：3)
So when you create a Skew-T with:
import matplotlib.pyplot as plt
from metpy.plots import SkewT
fig = plt.figure()
skew = SkewT(fig)
You can set the limits just like you would with a standard Matplotlib Axes, by accessing the .ax attribute on the SkewT instance:
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
To control the appearance of the special plot lines, just pass keyword arguments like you would when controlling the appearance of any Matplotlib line; for fading the line, you would want to pass the alpha:
skew.plot_moist_adiabats(color='dark red', alpha=0.2)